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Finding the Fourth Proportional to 313,655.12, 470,479.80 and 126,663.92

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Solution

The fourth proportional to 313,655.12, 470,479.80 and 126,663.92 is: 189,994.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,655.12 : 470,479.80 = 126,663.92 : x
  2. Step 2: Convert to fraction form
    313,655.12/470,479.80 = 126,663.92/x
  3. Step 3: Cross multiply
    313,655.12x = 470,479.80 × 126,663.92
  4. Step 4: Simplify right side
    313,655.12x = 59,592,815,748.82
  5. Step 5: Solve for x
    x = 59,592,815,748.82/313,655.12
  6. Step 6: Final answer
    x = 189,994.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.